Multivariable Regression Equivalent Model of Interconnected Active Distribution Networks Based on Boundary Measurement

Anan Zhang, Huang Huang, Wei Yang and Hongwei Li
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Anan Zhang: School of Electrical and Information Engineering, Southwest Petroleum University, Chengdu 610500, China
Huang Huang: School of Electrical and Information Engineering, Southwest Petroleum University, Chengdu 610500, China
Wei Yang: School of Electrical and Information Engineering, Southwest Petroleum University, Chengdu 610500, China
Hongwei Li: School of Electrical and Information Engineering, Southwest Petroleum University, Chengdu 610500, China

Energies, 2019, vol. 12, issue 12, 1-17

Abstract: With the increasing complexity of the active distribution network (ADN) due to distributed generation (DG) integration, together with the electricity market evolution, the traditional ADN is divided into multiple areas to operate independently. Due to technical problems or business privacy, the internal network regional control center cannot grasp the changes of the external regional network in time. In order to accurately reflect the distribution network operation state, a multivariable regression equivalent model is proposed in this paper. Firstly, the external network is made equivalent to a multi-port Norton model. The multivariable linear regression model is then derived based on the equivalent distribution network, and the regression model variables are constructed using boundary node information collected by the measurement equipment. Finally, the maximum likelihood estimation (MLE) is used to estimate the parameters of the multivariable linear regression model. Furthermore, case studies demonstrate the effectiveness and robustness of the proposed method, and detailed information of external ADN is unnecessary, except for the boundary node information. The proposed method can also be applied for three-phase unbalanced ADN efficiently.

Keywords: active distribution network; distributed generation; multivariable linear regression; dynamic equivalent model; three-phase unbalance (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
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